RT9953 RICHTEK [Richtek Technology Corporation], RT9953 Datasheet - Page 11

• Manufacturer Part Number: RT9953
• Description: 4+1 CH Power Management IC
• Manufacturer: RICHTEK [Richtek Technology Corporation]

DS9953-02 April 2011
CH1 Step-Up Output Voltage vs. Output Current
CH2 Step-Up Output Voltage vs. Output Current
5.000
4.995
4.990
4.985
4.980
4.975
4.970
4.965
4.960
4.955
4.950
3.45
3.40
3.35
3.30
3.25
3.20
3.15
CH4 Step-Down Efficiency vs. Output Current
100
90
80
70
60
50
40
30
20
10
0
10
0
0
V
V
V
V
V
100
100
BAT
BAT
BAT
BAT
BAT
= 3.4V
= 3.6V
= 3.9V
= 4.2V
= 4.5V
Output Current (mA)
Output Current (mA)
Output Current (mA)
200
200
V
L4 = 4.7 H, C11 = 10 F
300
300
DDM
100
= 5V, V
400
400
OUT_CH4
V
V
V
V
V
BAT
BAT
BAT
V
500
500
DDM
DDM
BAT
= 3.3V,
= 4.5V
= 1.8V
= 3V
= 5V
= 3V
= 3V
1000
600
600
CH2 Step-Down Output Voltage vs. Output Current
CH3 Step-Down Output Voltage vs. Output Current
1.210
1.208
1.205
1.203
1.200
1.198
1.195
1.193
1.190
1.85
1.84
1.83
1.82
1.81
1.80
1.79
1.78
CH4 Step-Down Efficiency vs. Output Current
100
90
80
70
60
50
40
30
20
10
0
10
0
0
V
V
V
V
V
V
100
BAT
BAT
BAT
BAT
BAT
BAT
200
= 1.8V
= 2.5V
= 3V
= 3.3V
= 3.6V
= 4.5V
Output Current (mA)
Output Current (mA)
Output Current (mA)
200
400
V
L4 = 4.7 H, C11 = 10 F
300
100
DDM
= 3V, V
600
RT9953
400
www.richtek.com
OUT_CH4
V
V
V
V
V
800
V
V
BAT
BAT
BAT
BAT
BAT
500
DDM
DDM
= 1.2V,
= 3V
= 4.5V
= 4.5V
= 3V
= 2.7V
= 5V
= 5V
11
1000
1000
600